Scott and Watt, you made me feel so old. Took me almost a minute to finally get the drift of your replies. Don't know if my memory is starting to fail, I've matured too much, I've given up, or what. All I know is that if the same question was brought up in apprentice class in 1969 it would have been an hour before that class got under control again. Ron
I can feel that the nipple should go into the hole on the wall, and it possibly has an inner thread too. The other should be the plastic one that also goes in the wall to hold the screw?
The world is full of beauty if the heart is full of love